Lucian said What about in your actual history class? Were the religions of the past discussed at all? And how was science handled?
Contrary to popular belief, it's not much different than public school. We learned about dinosaurs and geology and all that normal stuff, if a student asked a question about how it conflicted with Catholicism it would usually be answered with something about how we believe something that wasn't the mainstream, so things would be a bit different. It wasn't oppressive or anything, they didn't force beliefs down our throat.
Take this with a grain of salt, it was around 10 years ago and I don't remember everything too clearly.